Beautiful groups. Haven't been to Williamsport in years. My younger brother, Ed, maybe up to 3 years ago. He used to shoot F-class and do the stats.The 6.5 CM answered a need for an accurate, pleasant to shoot round that was easy on barrel throats so it took off like crazy. It spawned the growth of other 6.5 cartridges that exceed the CM's muzzle velocity but not by any amount critical to target shooting, at least not in a short-action length and at reasonable distances. All of its qualities still exist so it is every bit as good a target shell as it ever was. I saw that you don't handload your ammunition so the variety and abundance of factory ammo probably exceeds any of the other 6.5s, something that has to be important for you.
As far as long-range shooting goes, I frequent the Original Pennsylvania 1,000 Yard Benchrest Club near Trout Run, PA (just north of Williamsport off Exit 14 of US15) where the go-to rounds these days are the newer 6mm ones (6GT, 6mm Dasher, etc.) unless the wind is blowing, at which time the 300 Winchester Short Magnum rules the roost. In fact, the world record 10-round group was shot at that club using that cartridge. The 300 Winchester Magnum is not even in the conversation there - too much recoil and barrel erosion. Those guys and gals don't want to spend the time and money developing the best handload recipe only to have to start over when they have to change barrels frequently.
I have an early second generation Ruger Precision Rifle in 6.5CM for which I handload. I don't shoot really long-range with it so I use 120- and 140-grain bullets in it. It shoots both with equally good accuracy, recoils very softly and is fun to shoot. The Ruger might represent the best value in PRs at this time - it might no longer be the best but like the 6.5CM, it still does its job well. Attached are photos of five-shot 100-yard groups shot with it.
There are a lot of choices in rifles these days - too many, almost - but that's a good problem to have.
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